Department of Physics Papers

Document Type

Journal Article

Date of this Version

8-26-1968

Publication Source

Physical Review Letters

Volume

21

Issue

9

Start Page

602

Last Page

604

DOI

10.1103/PhysRevLett.21.602

Abstract

It is shown that the expansion in density of spin deviations for the Heisenberg antiferromagnet at low temperatures leads to a 1/z expansion for the free energy. In contrast to the 1/S expansion, the kinematic properties of spin operators are realized within each order of the expansion. The spin-wave energy at long wavelength is also calculated.

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Date Posted: 20 August 2015

This document has been peer reviewed.